package main

import "fmt"

/**
 * @author: guangcheng
 * @date:   2020/11/2 23:36
 * @version  V1.0
 * @description:
 *
 */
func main() {

	var a int = 10
	var b int = 20

	a = a + b
	//
	b = a - b //b=a
	a = a - b //a=b

	//a= 20 b= 10
	fmt.Println("a=", a, "b=", b)

}
